Firefly Aerospace (FLY)

Firefly Aerospace on one page: short interest, daily short volume, fails to deliver, planned sales, large holders, 13F holders, earnings dates and insider trades. Listed on Nasdaq, classified by the SEC as guided missiles & space vehicles & parts.

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13.5M

Short interest

settlement 2026-10-15

4.0

Days to cover

+0.8 days vs prior

69.3%

Short share of volume

2026-11-02

1,492

Fails to deliver

settlement 2026-10-09

Wed 11 Nov

Next earnings

estimated date

Insider flow, 90 days

0 buys, 0 sells

As of 2026-11-02.

Short interest

FINRA, twice a month. The newest 48 settlements in the table, 48 in the chart. JSON

As of 15 October 2026, short interest in FLY is 13,480,890 shares, up 2,375,209 shares over the last month. Over the last 48 readings it ranged from 281,009 shares (26 February 2021) to 13,480,890 shares (15 October 2026). The latest reading sits at the top of that range. At the reported average volume of 3.4M shares a day that is 4.0 days to cover.

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Settlement	Shares short	Change	Avg daily volume	Days to cover
2026-10-15	13,480,890	+12.9%	3,397,915	3.97
2026-09-30	11,937,187	+7.5%	3,707,788	3.22
2026-09-15	11,105,681	+2.6%	2,184,300	5.08
2026-08-31	10,819,717	-2.8%	2,362,405	4.58
2026-08-14	11,126,799	+1.6%	3,462,502	3.21
2026-07-31	10,948,785	-8.4%	3,491,488	3.14
2026-07-15	11,953,174	-9.4%	3,432,927	3.48
2026-06-30	13,190,080	+11.4%	7,677,039	1.72
2026-06-15	11,836,941	+3.7%	8,123,132	1.46
2026-05-29	11,413,957	+23.9%	10,821,956	1.05
2026-05-15	9,214,108	+12.9%	6,979,050	1.32
2026-04-30	8,162,080	-11.1%	5,250,137	1.55
2026-04-15	9,181,514	+17.6%	8,561,491	1.07
2026-03-31	7,807,766	+14.6%	6,727,961	1.16
2026-03-13	6,810,462	+6.0%	3,726,349	1.83
2026-02-27	6,422,012	+18.4%	2,344,174	2.74
2026-02-13	5,423,391	-6.7%	3,363,841	1.61
2026-01-30	5,815,121	+13.5%	3,708,073	1.57
2026-01-15	5,124,258	+8.6%	3,658,392	1.40
2025-12-31	4,716,690	+36.4%	3,514,282	1.34
2025-12-15	3,458,143	+18.1%	2,455,652	1.41
2025-11-28	2,929,457	+10.8%	1,908,277	1.54
2025-11-14	2,643,769	+11.2%	2,550,045	1.04
2025-10-31	2,377,499	+13.9%	1,382,417	1.72
2025-10-15	2,087,531	-0.9%	3,121,237	1.00
2025-09-30	2,106,633	+31.0%	2,196,296	1.00
2025-09-15	1,608,056	+82.9%	592,260	2.72
2025-08-29	879,206	+7.8%	690,666	1.27
2025-08-15	815,637	+100.0%	4,538,976	1.00
2021-07-30	906,769	-3.7%	194,262	4.67
2021-07-15	941,628	+2.5%	221,891	4.24
2021-06-30	918,272	-0.5%	259,496	3.54
2021-06-15	922,951	-0.6%	178,488	5.17
2021-05-28	928,220	-13.8%	148,620	6.25
2021-05-14	1,076,212	-16.8%	213,965	5.03
2021-04-30	1,294,048	+44.9%	383,409	3.38
2021-04-15	893,162	+50.7%	808,904	1.10
2021-03-31	592,808	+78.2%	1,323,761	1.00
2021-03-15	332,581	+18.4%	395,919	1.00
2021-02-26	281,009	-11.5%	310,396	1.00
2021-01-29	363,479	+9.6%	253,198	1.44
2021-01-15	331,717	-11.1%	391,541	1.00
2020-12-31	373,259	+26.5%	768,593	1.00
2020-12-15	295,144	-25.9%	314,553	1.00
2020-11-30	398,091	+20.4%	329,147	1.21
2020-11-13	330,583	-18.4%	392,608	1.00
2020-10-30	404,861	+5.9%	184,222	2.20
2020-10-15	382,163	-28.4%	195,436	1.96

Daily short volume

FINRA Reg SHO, the last 30 sessions. JSON

As of 2 November 2026, the short share of FLY volume is 69.3%, up 2.2 points over the last five sessions. Over the last 30 readings it ranged from 42.3% (2 October 2026) to 73.4% (23 October 2026). The latest reading is 12.3 points above the 30-session average of 57.0%, on 1.3M shares reported.

Date	Short volume	Total volume	Short share	Exempt
2026-11-02	876K	1.3M	69.3%	99,899
2026-10-30	725K	1.2M	58.2%	52,385
2026-10-29	465K	774K	60.1%	15,481
2026-10-28	437K	629K	69.5%	166
2026-10-27	740K	1.3M	55.9%	105
2026-10-26	632K	940K	67.2%	66
2026-10-23	648K	884K	73.4%	509
2026-10-22	682K	951K	71.7%	0
2026-10-21	850K	1.3M	67.8%	101
2026-10-20	542K	874K	62.0%	448
2026-10-19	456K	803K	56.9%	1,617
2026-10-16	682K	1.2M	57.5%	1,933
2026-10-15	900K	1.6M	56.2%	1,951
2026-10-14	872K	1.6M	55.2%	4,905
2026-10-13	690K	1.2M	57.0%	989
2026-10-12	382K	751K	50.8%	2,868
2026-10-09	645K	1.4M	47.8%	11
2026-10-08	687K	1.3M	52.6%	93
2026-10-07	813K	1.5M	55.8%	11,883
2026-10-06	914K	1.8M	51.9%	9,559
2026-10-05	712K	1.5M	46.8%	4,781
2026-10-02	923K	2.2M	42.3%	6,378
2026-10-01	932K	1.6M	56.6%	5,585
2026-09-30	1.1M	1.8M	58.7%	6,750
2026-09-29	619K	1.1M	58.7%	153
2026-09-28	713K	1.5M	46.3%	4,862
2026-09-25	1.3M	2.3M	56.8%	190
2026-09-24	570K	1.1M	49.8%	10,248
2026-09-23	480K	1.0M	46.2%	2,536
2026-09-22	632K	1.2M	52.2%	578

Fails to deliver

SEC, the last 30 settlement dates with a fail. JSON

As of 9 October 2026, the fails-to-deliver balance in FLY is 1,492 shares, down 1,990 shares over the last settlement date. Over the last 30 readings it ranged from 10 shares (12 August 2026) to 338,445 shares (31 August 2026). The latest reading sits at the bottom of that range.

Settlement	Shares failed	Price	Value
2026-10-09	1,492	$20.67	$31K
2026-10-08	3,482	$21.51	$75K
2026-10-02	50,214	$22.85	$1.1M
2026-10-01	500	$23.15	$12K
2026-09-29	1,939	$24.11	$47K
2026-09-28	15,388	$24.36	$375K
2026-09-25	7,451	$23.09	$172K
2026-09-22	13,095	$22.83	$299K
2026-09-16	110	$20.49	$2K
2026-09-10	6,289	$21.81	$137K
2026-09-08	13,370	$21.67	$290K
2026-09-04	2,417	$21.06	$51K
2026-08-31	338,445	$21.26	$7.2M
2026-08-28	1,529	$22.16	$34K
2026-08-27	132	$22.26	$3K
2026-08-26	300	$22.26	$7K
2026-08-24	56,640	$24.45	$1.4M
2026-08-21	2,093	$23.63	$49K
2026-08-18	336	$27.18	$9K
2026-08-12	10	$26.36	$264
2026-08-11	6,300	$25.76	$162K
2026-08-10	1,725	$26.71	$46K
2026-07-29	111,189	$19.32	$2.1M
2026-07-28	143	$19.88	$3K
2026-07-24	59,237	$20.70	$1.2M
2026-07-22	41,841	$21.11	$883K
2026-07-21	110	$19.67	$2K
2026-07-20	1,080	$19.27	$21K
2026-07-13	519	$24.09	$13K
2026-07-08	59	$25.66	$2K

Insider trades

SEC Form 4, newest first. JSON

No open-market insider trades were reported for FLY in the last 90 days. The most recent filings are listed below. Latest filing: Ambrose Richard F (Director) on 2026-10-05.

Date	Insider	Title	Type	Shares	Price	Value	Owned after
2026-10-05	Ambrose Richard F	Director	Grant	7K	$0.00	$0	7K
2026-09-30	AEROEQUITY GP, LLC	10% owner	Other transaction	42K	$0.00	$0	17.7M
2026-09-22	Kim Jesung	Chief Executive Officer	Exercise or conversion	43K	$2.31	$100K	899K
2026-09-17	Ma Darren	Chief Financial Officer	Exercise or conversion	33K	$0.49	$16K	330K
2026-09-17	Ma Darren	Chief Financial Officer	Exercise or conversion	54K	$0.42	$23K	297K
2026-09-16	Ma Darren	Chief Financial Officer	Tax withholding	18K	$20.28	$371K	242K
2026-09-16	Wu Remington	Chief Accounting Officer	Tax withholding	2K	$20.28	$37K	39K
2026-09-16	Ferring Russell Shea	Chief Technology Officer	Tax withholding	17K	$20.28	$339K	525K
2026-09-16	Kim Jesung	Chief Executive Officer	Tax withholding	86K	$20.28	$1.7M	855K
2026-08-24	Ma Darren	Chief Financial Officer	Tax withholding	256	$23.10	$6K	261K
2026-08-14	Boland Ryan Michael	Director	Other transaction	3K	price not stated in the filing	not stated	127K
2026-08-14	Boland Ryan Michael	Director	Other transaction	41K	price not stated in the filing	not stated	0
2026-08-04	O'Konek Nathan	General Counsel & Secretary	Grant	103K	$0.00	$0	103K
2026-06-04	McAllister Kevin G	Director	Grant	4K	$0.00	$0	7K
2026-06-04	Zurbuchen Thomas Hansueli	Director	Grant	4K	$0.00	$0	8K
2026-06-04	Lusczakoski Jonathan Donald	Director	Grant	4K	$0.00	$0	9K
2026-06-04	Konert Kirk Michael	Director	Grant	4K	$0.00	$0	10K
2026-06-04	Emerson Christopher Plummer IV	Director	Grant	4K	$0.00	$0	7K
2026-06-04	Braden Pamela Joyce	Director	Grant	4K	$0.00	$0	31K
2026-06-04	Boland Ryan Michael	Director	Grant	4K	$0.00	$0	7K
2026-06-01	Glow NS Holdings, LLC	TenPercentOwner	Sell	2.8M	$48.00	$134.5M	17.7M
2026-06-01	Glow NS Holdings, LLC	TenPercentOwner	Sell	5.2M	$48.00	$249.5M	33.0M
2026-06-01	AEROEQUITY GP, LLC	10% owner	Sell	2.8M	$48.00	$134.5M	17.7M
2026-06-01	AEROEQUITY GP, LLC	10% owner	Sell	5.2M	$48.00	$249.5M	33.0M
2026-05-18	Wheeler David Leigh	General Counsel	Sell	4K	$45.12	$170K	143K
2026-05-18	Wheeler David Leigh	General Counsel	Exercise or conversion	4K	$2.31	$9K	147K
2026-04-17	Wheeler David Leigh	General Counsel	Sell	4K	$45.04	$170K	143K
2026-04-17	Wheeler David Leigh	General Counsel	Exercise or conversion	4K	$2.31	$9K	147K
2026-04-08	Wu Remington	Chief Accounting Officer	Grant	10K	$0.00	$0	40K
2026-03-23	Boland Ryan Michael	Director	Other transaction	539K	price not stated in the filing	not stated	0
2026-03-23	Boland Ryan Michael	Director	Other transaction	689K	price not stated in the filing	not stated	41K
2026-03-23	Boland Ryan Michael	Director	Other transaction	1.6M	price not stated in the filing	not stated	0
2026-03-23	Boland Ryan Michael	Director	Other transaction	123K	price not stated in the filing	not stated	123K
2026-03-19	Kim Jesung	Chief Executive Officer	Grant	53K	$0.00	$0	942K
2026-03-10	Sanchez Ramon Gilbert	Chief Operating Officer	Grant	18K	$0.00	$0	118K
2026-03-10	Wheeler David Leigh	General Counsel	Grant	25K	$0.00	$0	143K
2026-03-10	Ma Darren	Chief Financial Officer	Grant	27K	$0.00	$0	261K
2026-03-10	Ferring Russell Shea	Chief Technology Officer	Grant	16K	$0.00	$0	542K
2026-02-25	McAllister Kevin G	Director	Grant	3K	$0.00	$0	3K
2026-02-25	Konert Kirk Michael	Director	Grant	3K	$0.00	$0	7K
2026-02-25	Lusczakoski Jonathan Donald	Director	Grant	3K	$0.00	$0	6K
2026-02-25	Zurbuchen Thomas Hansueli	Director	Grant	3K	$0.00	$0	4K
2026-02-25	Weiser Marc Allen	Director	Grant	3K	$0.00	$0	3K
2026-02-25	Emerson Christopher Plummer IV	Director	Grant	3K	$0.00	$0	3K
2026-02-25	Braden Pamela Joyce	Director	Grant	3K	$0.00	$0	28K
2026-02-25	Boland Ryan Michael	Director	Grant	3K	$0.00	$0	3K
2025-12-22	Sanchez Ramon Gilbert	Chief Operating Officer	Grant	100K	$0.00	$0	100K
2025-09-24	Wu Remington	Chief Accounting Officer	Grant	30K	$0.00	$0	30K
2025-09-24	Ma Darren	Chief Financial Officer	Grant	222K	$0.00	$0	234K
2025-09-24	Wheeler David Leigh	General Counsel	Grant	56K	$0.00	$0	118K
2025-09-24	Kim Jesung	Chief Executive Officer	Grant	889K	$0.00	$0	889K
2025-09-24	Ferring Russell Shea	Chief Technology Officer	Grant	217K	$0.00	$0	526K
2025-09-24	Fermon Daniel Frank	Chief Operating Officer	Grant	89K	$0.00	$0	89K
2025-08-24	Ma Darren	Chief Financial Officer	Grant	768	$0.00	$0	234K
2025-08-06	AE INDUSTRIAL PARTNERS STRUCTURED SOLUTIONS I, LP	TenPercentOwner	Buy	11K	$45.00	$500K	11K
2025-08-06	Lusczakoski Jonathan Donald	Director	Buy	2K	$45.00	$100K	2K
2025-08-06	Konert Kirk Michael	Director	Buy	3K	$45.00	$150K	3K
2025-08-06	Lusczakoski Jonathan Donald	Director	Buy	266	$45.00	$12K	266
2025-08-06	Zurbuchen Thomas Hansueli	Director	Buy	800	$45.00	$36K	800
2025-08-06	Braden Pamela Joyce	Director	Buy	9K	$45.00	$400K	24K
2025-08-06	AEROEQUITY GP, LLC	10% owner	Buy	11K	$45.00	$500K	11K

Form 4 filings are due within two business days of the trade. Insiders sell for many reasons that say nothing about the company; open-market buys are rarer.

Planned sales (Form 144)

Newest first. JSON

3 Form 144 notices on file for FLY worth $9.5M at the prices reported; 0 in the last 90 days worth $0. Latest: WFI VENTURE CAPITAL LLC filed on 2026-05-13 to sell 153,389 shares ($6.1M) from 2026-05-13.

Filed	Seller	Shares	Market value	Of outstanding	Sale from	Broker
2026-05-13	WFI VENTURE CAPITAL LLCAffiliate	153K	$6.1M	0.096%	2026-05-13	Morgan Stanley Smith Barney LLC Executive Financial Services
2026-05-13	BFI EQUITY LLCAffiliate	3K	$135K	0.002%	2026-05-13	Morgan Stanley Smith Barney LLC Executive Financial Services
2026-05-13	WFI EQUITY LLCAffiliate	82K	$3.3M	0.051%	2026-05-13	Morgan Stanley Smith Barney LLC Executive Financial Services

Large holders (13D and 13G)

One row per reporting person with its latest filing, newest first. JSON

5 holders report 5% or more of FLY in their latest filing, all on Schedule 13G (passive). The largest reported stake is AeroEquity GP, LLC at 30.3% of the class (50,805,752 shares), filed 2026-08-14 for an event on 2026-06-30.

Filed	Form	Holder	Shares	Of class	Event
2026-08-14	13G/Ano. 2	Markusic Thomas Eindividual	8.8M	5.2%	2026-06-30
2026-08-14	13G/Ano. 2	AeroEquity GP, LLCother entity	50.8M	30.3%	2026-06-30
2026-08-14	13G/Ano. 2	Mitsui & Co., LTD.corporation	2.1M	1.2%	2026-06-30
2026-08-14	13G/Ano. 2	Marc Allen Weiserindividual	904K	0.5%	2026-06-30
2026-08-11	13G/Ano. 1	Astera Institutecorporation	11.3M	6.9%	2026-06-30
2026-08-11	13G/Ano. 1	Jed McCalebindividual	11.3M	6.9%	2026-06-30
2026-02-02	13G/Ano. 1	Thomas Markusicindividual	12.5M	7.6%	2025-12-31

13F holders

Tracked managers holding FLY at their latest 13F. JSON

6 of the 30 tracked managers held FLY at their latest 13F, $117.7M in total at quarter-end prices. Two Sigma Investments is the largest at $79.8M (0.1% of its portfolio) as of 2026-06-30. Over the prior quarter 5 added shares and 1 cut.

Fund	Quarter	Shares	Value	Of portfolio	Change in shares
Two Sigma Investments	2026-06-30	2.7M	$79.8M	0.06%	+2.7M
Renaissance Technologies	2026-06-30	618K	$18.2M	0.03%	+288K
Millennium Management	2026-06-30	414K	$12.2M	0.00%	+83K
D. E. Shaw & Co.	2026-06-30	139K	$4.1M	0.00%	new
AQR Capital Management	2026-06-30	65K	$1.9M	0.00%	+150
Citadel Advisors	2026-06-30	52K	$1.5M	0.00%	-34K

Only the 30 tracked managers on the funds hub; a 13F reports long positions in US listed stock at quarter end, 45 days late, and says nothing about shorts or positions sold since.

What this page is

Firefly Aerospace in the regulatory record

Regulators publish company data in separate files that never sit next to each other: FINRA's twice-monthly short interest, its daily short sale volume, the SEC's fails-to-deliver counts, and each insider's Form 4. A company page puts those series for one ticker on one URL, with planned sales, large holders, 13F holders and financials beside them, so the short position, the daily flow, the settlement fails and what insiders are doing can be read together.

Each section has its own history table, a one-line summary of the latest figures and its own JSON and CSV links, and says when its source last updated.

This page follows Firefly Aerospace (FLY), SEC CIK 1860160, listed on Nasdaq, classified by the SEC as guided missiles & space vehicles & parts. The cross-market tables live on the short interest and insider transactions hubs.

Source and updates

Short interest: FINRA consolidated short interestSource: FINRA.Twice a month, about eight business days after settlement. Latest 2026-10-15.JSON and CSV
Daily short volume: FINRA Reg SHO daily filesSource: FINRA.Every trading day, the morning after FINRA posts it. Latest 2026-11-02.JSON and CSV
Fails to deliver: SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-10-09.JSON and CSV
Planned sales: SEC EDGAR Form 144Source: SEC.New notices appear shortly after the SEC posts them; a notice is filed on or before the sale. Latest 2026-05-13.JSON and CSV
Large holders: SEC EDGAR Schedule 13D and 13GSource: SEC.New filings appear shortly after the SEC posts them. A 13D is due within five business days of crossing 5%; a 13G follows the passive schedule. Latest 2026-08-14.JSON and CSV
13F holders: SEC EDGAR Form 13F-HRSource: SEC.Quarterly, filed within 45 days of quarter end; 30 tracked managers. Latest 2026-06-30.JSON and CSV
Earnings dates: SEC EDGAR 8-K filings (Item 2.02)Source: SEC.Twice a day. Reported dates come from the company's 8-K filings; the next date is marked as an estimate until the 8-K arrives. Latest 2026-08-11.JSON and CSV
Insider trades: SEC EDGAR Form 4Source: SEC.New filings appear shortly after the SEC posts them; they're due two business days after the trade. Latest 2026-10-05.JSON and CSV
Company record: EDGAR filing index for CIK 1860160Ticker, name and exchange from the SEC's company list, refreshed weekly.
Rate limits: 10 requests a minute without a key, 30 with a free key from a free account.

How to read it

Read the position against the flow: rising short interest with a high daily short share is new shorting; rising short interest with a normal short share is old shorts holding on.
Insider buys next to a large short position are rare and stand out; insider sells next to one are common and mean little.
Fails to deliver matter relative to the float, not in absolute shares; a million failed shares in a mega cap is noise.

Analysis of what the data shows, not advice. XOOMAR does not recommend buying, selling or holding anything.

Other companies the SEC classifies as guided missiles & space vehicles & parts

Other company pages

Datasets

Frequently Asked Questions

How much of FLY is sold short?

13,480,890 shares were held short at the 2026-10-15 settlement, 4.0 days of average volume. FINRA publishes the next count about eight business days after the 15th and the last business day of the month.

What is FLY's daily short volume?

On 2026-11-02, 876,276 of the 1,263,468 FLY shares reported to FINRA were sold short, 69.3% of the day's reported volume. Short volume is a flow for one day, not a position.

Does FLY have fails to deliver?

The SEC's latest file shows 1,492 FLY shares failed to deliver at settlement 2026-10-09. Fails are reported per settlement date and published twice a month with a lag.

Are FLY insiders buying or selling?

No open-market insider trades were reported for FLY in the last 90 days. The most recent filings are listed below. Latest filing: Ambrose Richard F (Director) on 2026-10-05.

Have FLY insiders filed to sell?

Who owns 5% or more of FLY?

Which tracked 13F managers own FLY?

6 of the 30 tracked 13F managers held FLY shares at their latest filing, $117.7M in all. The largest: Two Sigma Investments (2.7M shares, $79.8M), Renaissance Technologies (618K shares, $18.2M), Izzy Englander's Millennium Management (414K shares, $12.2M), D. E. Shaw & Co. (139K shares, $4.1M), Cliff Asness's AQR Capital Management (65K shares, $1.9M), Ken Griffin's Citadel Advisors (52K shares, $1.5M).

Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.